Spark-arrester.



No. 65|,273. Patented lune 5, |900.

e. H. noon.

SPARK ABBESTER.

(Application led Aug. 30, 1897. Renewed Nov, 11, 1899.)

(N0 Model.)

WHIDQSSQS ly )H19 Airways, fm; am, i 2 A i vUNITED STATES PATENT OFFICE.

GRENVILLE HEMAN ROOD, OF SAN ANTONIO, TEXAS.

SPARK-ARRESTER.

SPECFICATION forming part Of Letters Patent N 0. 651,273, dated June 5, 1900. Application filed August 30, 1897. Renewed November l1, 1899. Serial No. 736,688. (No model.)

To alt 'LU/tom, t may con/067%:

Be it known that I, GRENVILLE HEMAN ROOD, a citizen ofthe United States, residing at San Antonio, in the county of Bexar and and draft-regulators for locomotive-boilers,4

its object being to provide a simple and etlicient mechanism of this character which will etlectually prevent the escape of cinders and sparks through the smoke-stack without necessitating the use of woven-wire netting cornnlonly employed for this purpose and by means of which the draft may be regulated by the fireman or engineer from the cab of the locomotive.

With this object in view the invention consists of the several details of construction and combination of parts,as will be fully described hereinafter and particularly pointed out in the claims. y

In the drawings, Figure l is a vertical longitudinal sectional view of a portion of a loc omotive-boiler equipped with my improved spark-arrester. Fig. 2 is a vertical transverse section on the line of Fig. 1. Fig. 3 is a detail perspective view of the pivoted plate detached. Fig. 4 is a detached detail.

Similar reference-numerals indicate similar parts in the several iigures.

1 indicates the boiler, 2 the liuc-sheet, 3 the smoke-box, 4 the smoke-stack, and 5 the exhaust-nozzle, all of which may be ot' any ordinary or approved construction, except that the latter may, if desired, be of greater capacity than usual, as will be explained here- 6 indicates a plate which extends in a horizontal plane from the flue-sheet just above the top row of fines to nearly the front end of the smoke-box. The plate 6 extends entirely across the smoke-box and is secured to the sides thereof and to the flue-sheet in any suitable manner.

7 indicates a curved plate bolted or otherwise secured to the front end of the plate 6 and extending upwardly and forwardly therefrom, and its ends tit close to the opposite sides of the smoke-box and may be secured thereto in any suitable manner, if preferred.

riveted or otherwise secured, and this rod is journaled in openings 12, formed in the sides of the smoke-box at opposite points. The

rod projects at one end beyond the outer face of the smoke-box and is provided with a crank-arm 13.

14 indicates a rod connected to the crankarm 13`and is designed to extend back to the cab of the engine, and it will preferably be provided with a handle l5 and also with notches (indicated by 16) adapted to engage in a suitable catch (indicated by 17) in order to hold it in any adjusted position desired. v

The plate 8 is so pivoted within the smoke- L box that when its upper curved edge is in engagement with the upper portion of the smoke-box the said plate will lie in a plane substantially parallel with the plane of the curved plate 7 18 indicates an extension of the smoke.

stack projecting downwardly within the smoke-box, preferably to a point about midway between the horizontal plate G and the top of the smoke-box and directly over the exhaust nozzle, which latter projects upwardly through an opening in the plate G.

. When the engine is running, the pivoted plate 8 should always occupy the position indicated in full lines in Fig. l, and the smoke, cinders, and products of combustion will pass from the tlues along under the plate 6, up over the curved extension 7, down `between said extension and the plate 8, and under the latter to the space in the smoke-box above the horizontal plate 6, with which the stack communicates. During its passage in this manner the cinders and sparks will loecome separated from the lighter products of combustion, and the latter will be forced out through the stack by the exhaust-steam in the usual manner or will pass out naturally in the event the engine is not running. The downward extension of the stack is a further preventive against the escape ot' sparks or cinders from the smoke box through the smoke-stack, as will be clearly understood.

of its eiieetnally preventing the escape of' sparks and cinders out through the smokestack I am enabled to dispense entirely with y the use of wire-netting, and thus obtain a' freer draft, which allows the use of a larger i' exhaust-nozzle, and thus prevents back pressure on the pistons, which results in a considerable saving of fuel.

It will be understood that changes in the.

iform, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having thus described the invention, what having its upper edge curved to fit the smoke- I claim isl. The combination with a locomotive smoke-box and the smoke-stack, of a hori-l zontal plate supported within the smoke-box and engagingthe (lne-sheet above the flnes` and the sides of the smoke-box, and provided at its front end with an upwardly and for-l` wardly curved extension, and a plate pivoted Within the smoke-box above the horizontal plate and to the rear of its curved extension l and having its upper edge curved to fit the smoke-box, and means to rook the pivoted plate, substantially as described and for the purpose specied.

2. The combination with a locomotive smoke-box, the smoke-stack= and the exhaustnozzle, of a horizontal plate supported Within the smoke-box and engaging the flue-sheet above the fines and the sides of the smokebox, and provided at its front end with an upwardly and forwardly curved extension, said plate having also an opening for the passage of the end of the exhaust-nozzle, and a plate pivoted within the smoke-box above the horizontal plate and to the rear of its curved extension and having its upper edge curved to t the smoke-box, and means to rock the pivoted plate, substantially as described.

3. rPhe combination with a locomotive smoke-box, and the smoke-stack, of a hori- Zontal plate supported within the'smoke-box and engaging the fine-sheet above theiiues and the sides of the smoke-box, and provided at its front end with an upwardly and forwardl y curved extension, a plate pivoted within the smoke-box above the horizontal plate and to the rear of its curved extension, and

box, means to rock the pivoted plate, an extension projecting downwardly from the smokestack Within the smoke-box, and anexhaustnozzle extending through the horizontal plate immediately below said smoke-stack extension, substantially `as described. i

In testimony that I claim the foregoing a my own I have hereto aiixed my signatu re in the presence of two witnesses.

GRENVILLE HEMAN ROOD. Witnesses:

J. EISHL,

C. A. STIERER. 

